| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| LM317AH/NOPB | National Semiconductor Corporation | Check for Price | Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, MBCY3 | LM317AH vs LM317AH/NOPB |
| LM317AH/NOPB | Texas Instruments | Check for Price | Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, MBCY3 | LM317AH vs LM317AH/NOPB |
Part Details for LM317AH by Texas Instruments
Results Overview of LM317AH by Texas Instruments
- Distributor Offerings: (6 listings)
- Number of FFF Equivalents: (2 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (10 options)
- CAD Models: (Request Part)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
LM317AH Information
LM317AH by Texas Instruments is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Available Datasheets
| Part # | Manufacturer | Description | Datasheet |
|---|---|---|---|
| LM317AH | Texas Instruments | 1% Accurate, 1.5A Adjustable Linear Regulator with Short Circuit Protection 3-TO -40 to 125 | |
| LM317AH/NOPB | Texas Instruments | 1% Accurate, 1.5A Adjustable Linear Regulator with Short Circuit Protection 3-TO -40 to 125 |
Price & Stock for LM317AH
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
|
DISTI #
LM317AH-ND
|
DigiKey | IC REG LINEAR POS ADJ 1.5A TO3 Min Qty: 1 Container: Bulk |
1058 Bulk |
|
$12.3441 / $19.0900 | Buy Now |
|
DISTI #
87073660
|
Verical | Standard Regulator Pos 1.2V to 37V 1.5A 3-Pin TO-39 Bulk RoHS: Compliant Min Qty: 27 Package Multiple: 1 Date Code: 1301 | Americas - 33 |
|
$11.4375 / $14.3000 | Buy Now |
|
DISTI #
926-LM317AH
|
Mouser Electronics | Linear Voltage Regulators 1.5-A 40-V adjusta b le linear voltage r RoHS: Compliant | 489 |
|
$12.3400 / $19.0900 | Buy Now |
|
|
Rochester Electronics | IC VOLT REG Adjustable 1 REG 1.25V 1.5A TO39 Bulk RoHS: Compliant Status: Active Min Qty: 1 | 33 |
|
$9.1500 / $11.4400 | Buy Now |
|
DISTI #
87073660
|
Verical | Standard Regulator Pos 1.2V to 37V 1.5A 3-Pin TO-39 Bulk RoHS: Compliant Min Qty: 27 Package Multiple: 1 Date Code: 1301 | Americas - 33 |
|
$11.4375 / $14.3000 | Buy Now |
|
DISTI #
87073660
|
Verical | Standard Regulator Pos 1.2V to 37V 1.5A 3-Pin TO-39 Bulk RoHS: Compliant Min Qty: 27 Package Multiple: 1 Date Code: 1301 | Americas - 33 |
|
$11.4375 / $14.3000 | Buy Now |
US Tariff Estimator: LM317AH by Texas Instruments
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
LM317AH Part Data Attributes
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LM317AH
Texas Instruments
Buy Now
Datasheet
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Compare Parts:
LM317AH
Texas Instruments
Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, MBCY3
|
| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Part Package Code | TO-39 | |
| Pin Count | 3 | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.90 | |
| Adjustability | Adjustable | |
| Dropout Voltage1-Nom | 2.25 V | |
| Input Voltage-Max | 40 V | |
| Input Voltage-Min | 3 V | |
| Input-Output Voltage Differential-Max | 40 V | |
| Input-Output Voltage Differential-Min | 3 V | |
| JESD-30 Code | O-MBCY-W3 | |
| JESD-609 Code | e4 | |
| Length | 10.03 Mm | |
| Line Regulation-Max (%/V) | 0.02 | |
| Load Regulation-Max(%) | 1% | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 3 | |
| Operating Temperature TJ-Max | 125 °C | |
| Operating Temperature TJ-Min | -40 °C | |
| Operating Temperature-Max | 125 °C | |
| Operating Temperature-Min | -40 °C | |
| Output Current1-Max | 1.5 A | |
| Output Voltage1-Max | 37 V | |
| Output Voltage1-Min | 1.2 V | |
| Output Voltage1-Nom | 37 V | |
| Package Body Material | Metal | |
| Package Code | TO-39 | |
| Package Shape | Round | |
| Package Style | Cylindrical | |
| Packing Method | Bulk | |
| Qualification Status | Not Qualified | |
| Regulator Type | Adjustable Positive Single Output Standard Regulator | |
| Seated Height-Max | 4.7 Mm | |
| Surface Mount | No | |
| Technology | Bipolar | |
| Terminal Finish | Gold (Au) | |
| Terminal Form | Wire | |
| Terminal Position | Bottom | |
| Voltage Tolerance-Max | 5% | |
| Width | 9.14 Mm |
Alternate Parts for LM317AH
This table gives cross-reference parts and alternative options found for LM317AH. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM317AH, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
LM317AH Frequently Asked Questions (FAQ)
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The minimum input voltage required for the LM317AH to regulate the output voltage is 3V above the desired output voltage. For example, if you want a 5V output, the input voltage should be at least 8V.
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To prevent overheating, ensure good heat sinking, use a heat sink with a thermal resistance of less than 10°C/W, and keep the device away from high ambient temperatures. Also, reduce the input voltage to minimize power dissipation.
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The maximum output current of the LM317AH is 1.5A. However, it's recommended to limit the output current to 1A or less to ensure reliable operation and prevent overheating.
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No, the LM317AH is designed to regulate positive voltages only. If you need a negative voltage regulator, consider using a dedicated negative voltage regulator like the LM337.
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The output voltage of the LM317AH can be adjusted by using a resistive divider network between the output and the adjust pin. The output voltage is determined by the ratio of the resistors and the reference voltage (1.25V).